Hi all,My dog is three years old. He is a foxy x maltese and for his whole life he has been a fussy eater. He will sometimes deprive himself from food for a period of time. I have tried multiple things such as biscuits, meat and treats. He will sometimes eat the product i buy him for a week or so then decides he doesn't want it any more. Does anyone have any suggestions as to why this is? I really appreciate your help!